Music-sheet driver.



F. w. DR'APER MUSIC SHEET DRIVER. APPLIGATIONIILED MAY 9, 1910.

Patented Mar.14,1911

I v un-"nun.-

Witness UNITED STATES PATENT OFFICE.

FRANCIS w. DRAPEB, OF RICHMOND," INDIANA, ASSIGNOR T STARRIIANO COMPANY, OF 'BICHMOND, INDIANA, CORPORATION-OF INDIANA.

MUSIC-SHEET DRIVER.

lowing 1s a specification.

The object of my invention is to produce a mechanism for driving a perforated sheet over the tracker board of an automatic player mechanism for pianos, of such character that the music sheet may be very readily caused to properly register with the' perforations of the tracker board without distorting the sheet; such-that the sheet may be maintained under the proper tension at all times; with a gearshlfting mechanism of such character that the driving chain for re -winding will not be disturbed; and with such other improvements in details of construction as may be hereinafter pointed out.

The accompanying drawings illustrate my invention.

Figurel is a front elevation in partial vertical section;v Fig. 2 an end elevation; Fig. 3 a'section on line 33 of Fig. 1, and Fig. 4 a sectional detail of the connection between the re-wind shaft and a storage roll. i

In the drawings, 10 indicates the usual supporting frame or box iii-which is mounted a tracker board 11. Secured to the outer face of one end of box 10 is a plate 12 provided near its opposite ends with two spring cups 13 and 14 the inner ends of which are projected into openings 13 and 14 formed through the end wall'of the box at opposite sides of the tracker board. Mounted in cup 13 is a plunger 15 normally held projected by means of. a spring 16 mountedwithin the cup 13 and the plunger is held against too great a projection by means of a collar 17 secured to it. The innor end of the plunger is provided with a cup or socket 18 adapted to rotatably receive the axial pin 19 of the winding roll 21. The opposite end of roll 21 is provided with a pin 22 having the usual radial extensions 23 formed to be received in the 14 is a plunger 31 normally projected by A pl cation filed Jul 9,1910. Serial no. 560,272.

means of a contained within cup- 14, and held against too great projection by'meansof collar-34. The inner. end of plunger 31 is providedwith a socket 35 within which is rotatably mounted a head 36. The head 36 is held a ainst'withdrawal by means of a pin 37 whic is projected into a circumferential slot"38 formed in the shank of the head, and said head, at its exposed end, is provided with'a conical exterior 39 adapted to be received into the opening 40 of one make of storage rolls 41i .and said head is also provided with an axia pocket 42 adapted to receive the. axial pin of another make of storage rolls. Journaled in the opposite end of box 10,- in alinement with plunger 31, is a re-wind shaft 43 provided at its inner end with a head44 like head- 25, said head being pro'videdwith a central bore 45 and diametrically opposedradial slots 46. adapted to receive the radial projections of the axial pin of that type of storage rolls provided with such. an axial pin as would bereceived by the pocket 42.

In order to adapt the head 44 to receive thattype of storage rolls 41 illustrated in the "present drawings, I provide a readily removable head 47 held in position by a thumb screw 48. Head 47 at one end is provided with bore' 49 adapted to receive head 44, and extending diametrically across this bore is a pin 51 adapted to be received Y in the slots 46 of the head 44. At its opposite end the head 47 is provided with a,

diametrical tongue 52 adapted to enter a slot 53 formed in the bottom of the bore-54 of roll 41.

Plate 12 carries, at a point adjacent cug 13, a spring cup 71 which is projecte through a suitable opening in the end wall of box 10 and mounted in this cup is a plunger 72 normally projected by means of a spring 73. Secured to the exposed end of plunger 72 is a piece of friction material 74 adapted to bear against the flange 75 of the driving roll 21. This piece of friction material 74 wears out in time and, inorder that it maybe readily replaced; I provide a retaining ring 7 6 the bore of which is of such diameter that a circular piece of leather may be readily placed over the end of plunger 72 and the ring 76 then forced down .over the plunger and the leather so as to clamp the edge of the leather between the ring and plunger as clearly shown in Fig. 1.

ously, maintains the music sheet properly Journaled. between shafts 26 and 43 is the main shaft 81. This shaft near its outer end is provided with one or two radially projecting pins 82. Sleeved upon the outer end of shaft 81 is the hub 83 of the main driving sprocket 84: and this hub is provided with axial slots 85 in which pins 82 project and in which they may slide. Hub 83 near its inner end is provided with a circumferential slot 86 into which is projected a stationary retaining finger 87. J ourna'led 't'reely upon shaft 81 is a large sprocket wheel 88 the hub of which is provided with a circumferential slot 89 into which is projected a retaining finger 91.. Sprocket wheel 88 is provided on its inner face with the usual axially projecting clutch pin 92 and passing over said sprocket wheel is a sprocket chain 93 which passes to a sprocket pinion 94: secured to shaft 43. Rigidly secured to shaft 81 is a pinion 95 adapted to be thrown into and out of mesh with a gear 90 Secured to shaft 26. Pinion 95 is carried by a collar 97 which is provided with a clutch pin 98 adapted to be projected into engagement with clutch pin 92-, and is also provided with a circumferential groove 99 adapted to receive a pin 101 carried by a Shifting lever 102 i usual shitting lever 102. carries a finger 103 arranged to engage a head 10L carried by the lower end of rod 105 the upper end of which carries a head 100 lying beneath a brake arm 107 which is yieldingly urged into engagement with a brake wheel 108 secured to shaft 48. Shafts 26 and 4.3-3 are freely slidable axially through their bearings, and are urged in one direction, when rolls 21 and 11 are in place by means of springs 16 and 31.

In order to form abutments for the shafts 26 and 43 I provide two fingers 111 111 which are carried by a vertical rock shaft 112 journalcd in suitable brackets 113. At its lower end, shaft 112 is provided with an arm 114- to which is connected oneend of a threaded rod 115, the threaded portion projecting into a nut 110 journaled in the adjacent end wall of box 10 and, at its inner end. provided with a knurled head 117 readily accessible by theoperator.

In operation, an adjustment ot'head 117 will rock shaft 112 so that its fingerslll will be shifted and thus regulate simultaneously the positions of shafts 26 and 43 against the pressure oilthe springs 16 and 31 respectively, and thus shift the two rolls 21 and 41 simultaneously axially so as to shift the music sheet longitudinally of the tracker board and thus accurately register the perforations of the music sheet with the openings in the tracker board. This adjustment, by carrying both rolls simultaneupon the rolls so that there will be no inof the rolls. During the playing operation brake 107 is in engagement with brake wheel 108 so that a proper tension is maintained upon the music sheet and during the rewinding operation the friction exerted upon flange 75 by the friction piece 74 of plunger 72 will insure a properly tight rc-winding of the music sheet upon storage roll 41.

3y shifting lever 102 pin 98 may be withdrawn from the path oi movement of pin 92 and pinion 95 thrown into mesh with gear 96, or pinion 95 maybe withdrawn from gear 96 and pin 98 thrown into position to engage pin 92. Shaft 81 is shifted axially during this operation but the sprocket wheels 84 and 88 are not shifted and consequently the alinemcnt of chain 93 and of the main driving chain passing over sprocket wheel 84 will not be disturbed.

I claim as my invention- I 1. In a musical instrument the combination with a tracker board, of two driving shafts journaled upon opposite sides of the tracker board, driving means for alternately driving said shafts in opposite directions, a winding roll associated with one of said shatts and provided with an end flange, a spring-pressed plunger, a friction sheet em- Eng the end of said plunger and engaging the flange, and a ring embracing the edge of said sheet.

2. In a musical instrument, the combination with a tracker board and its inelosing casing, of two driving shafts journaled in said casingon opposite sides of the tracker board at one end thereof, a plate adapted to be secured to the opposite end of the casing and carrying two spring on s spaced to correspond with the spacing o the two driving shafts, a plunger mounted in each of said cups and each having an exposed end adapted to cooperate with a music-roll, a spring mounted in each cup behind its plunger to yieldingly project its plunger toward the driving shaft with which it is alined, a third spring cup carried by said plate adjacent the spring cup provided to cooperate with a winding roll, the said winding roll arranged between its spring-pressed plunger and its driving shaft, a spring arranged in said third cup, and a plunger also arranged in said third cup on top of the spring and provided at its outer end with a friction-surface adapted to engage the winding roll.

3. In a musical instrument, the combination. with a tracker board and its inclosing casing, of two driving shafts journaled in said casing on opposite sides of the tracker board at one end thereof, a plate adapted to be secured to the opposite end of the casing and carrying two spring cups spaced to correspond with the spacing of the two driving shafts. a plunger mounted in each of said cups and each having an exposed end adaptclination to improperly wind upon either t ed to cooperate with a music-rolh'a spring mounted in each cup behi. its plunger toyiel'dingly project its plunger toward the driving shaft with which it is aline d a third spring cup carried said plate adgaeent the spring cup provided i0 coiiperate with a bracing the exposed end of said last mentioned plunger, and a ring having an internal'diameter sumcient to clamp the edges of the friction sheet-about the end of the plung In witness whereof, I, have hereunto set my hand and seal at Richmond, Indiana,

this; third day of May, A. D. one thousand nine hundred and ten.

FRANCIS W. DRAPER. [12. 5.

Vitnesses E. H. HILL,

D. W1esms. 

